I haved Installet aTv flash 2.2, but there is no XBMC Why??

Thanks Alex

I think this is because there are reports of XBMC having problems running on the 5.2 firmware.

Once any such issues are resolved I expect that FireCore will add it back via an update to the Maintenance app.

any timeline on when this will be?

I would think you will be more likely to get an answer to this in the XBMC forums?